This Understand Why the Larger the Denominator, the Smaller the Fractional Parts Using Models and Real World Examples video also includes:

If you have ever taught third grade, you know one of the toughest concepts to teach is how a large denominator means smaller fractional parts. Real-world examples and models are used to show youngsters what the denominator of a fraction means and why as it gets larger, it is actually representing a smaller, equal part.